Payment from this sale is on eBay hold

[pkzclz]

Hi there.  I've sold on eBay here and there and never had this message come up.  I'm not sure what changed or why this transaction is this way.  Can anyone explain it to me?  The eBay website was no help.  

eBay has requested that the funds from this eBay sale be held temporarily. Money that is on eBay hold will automatically move to your available balance within 21 days. To help get your funds sooner, add shipping info on eBay. Other restrictions may apply. Contact eBay to find out more about why your funds are on hold and how you may be able to get your money sooner.